pentaho/pentaho-kettle — pull request #839 by andrey-markelov (2014-11-11 12:49:05+00:00)
Title: [SP-1624] fixed bug with DataGrid transformation of empty strings

fixed bug with DataGrid transformation of empty strings as null

1. DataGridMeta.java : Changed loading behavior while reading empty string data from xml file
2. ValueMetaBase.java : Fixed convert algorythm of empty strings

@mattyb149 @dkincade